Wellington County, Ontario · Water Quality Report Card
Conestogo Lake
Conestogo Lake in Wellington, Ontario received a water quality grade of D (Poor). Water clarity: 1.5 m visibility. Phosphorus: 62.6 µg/L.
- Clarity
- 1.5 m
- Type
- Eutrophic
Conestogo Lake is a productive, nutrient-rich eutrophic lake in Wellington County, Ontario. Water quality is graded D based on 2 sampling years through 2023. Compared to the 5 other monitored lakes in Wellington County, Conestogo Lake ranks #6 for water quality.
Source: EPA Water Quality Portal sampling records, Ontario MECP, last sampled 2023-08-01. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Murky, only visible to about 4.9 ft. Phosphorus level: 62.6 µg/L. Trophic State Index: 59.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.5 m | D |
| Phosphorus | 62.6 µg/L | D |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 59 | Eutrophic |
High nutrients, frequent algae, reduced clarity
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Fishing Conestogo Lake
Location
County Ranking
Ranked #6 of 6 lakes in Wellington
Cleaner Lakes Within 30 Miles
Conestogo Lake holds Grade D. 5 nearby lakes hold higher grades.
- BParadise LakeRegion of Waterloo · 12.9 mi · Two grade letters higher (D → B)
- BSunfish LakeRegion of Waterloo · 14.6 mi · Two grade letters higher (D → B)
- BPike LakeWellington · 20.2 mi · Two grade letters higher (D → B)
- CBelwood LakeWellington · 20.5 mi · Higher grade (D → C)
- CPuslinch LakeWellington · 26.2 mi · Higher grade (D → C)
Nearby Lakes in Wellington
Explore Conestogo Lake across LakeGrade
More Ontario Lake Rankings
Other Grade D Lakes in Ontario
Eutrophic Lakes in Ontario
More records, surveys & data sources
Where this data comes from
Measurements for Conestogo Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Data Sources
Water quality data from the EPA Water Quality Portal
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion
Most recent sample: 2023-08-01
Monitoring stations: